TNL-1299: Update default video.

cms/djangoapps/contentstore/features/video.py

cms/djangoapps/contentstore/features/video_editor.py

common/lib/xmodule/xmodule/tests/test_video.py

common/lib/xmodule/xmodule/video_module/video_module.py

common/lib/xmodule/xmodule/video_module/video_xfields.py

common/test/acceptance/pages/studio/video/video.py

common/test/acceptance/tests/helpers.py

...n/test/acceptance/tests/video/test_studio_video_editor.py

...n/test/acceptance/tests/video/test_studio_video_module.py

...st/acceptance/tests/video/test_studio_video_transcript.py

common/test/acceptance/tests/video/test_video_module.py

common/test/acceptance/tests/video/test_video_times.py

common/test/data/uploads/subs_3_yD_cEKoCk.srt.sjson

lms/djangoapps/courseware/features/video.feature

lms/djangoapps/courseware/tests/test_video_mongo.py